Isolated boost is comign out for the G5 which is gonna be great. Boost is controlled completely by the JB4 and not through the DME. Snappier boost, more consistent and controlled.

On top of that, the G5 gives you unlimited boost, no OHM's to play with, and you get a built in speed limiter defeat.

Along with No lift shift, 2 step limiter among other things.

So Yes, its worth it even for no FBO guys. SLD, NLS, 2 step, isolated boost just somethings everyone can use.
PLus its gonna have all the goodies that will come out down the road, so G5 is a no brainer.